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M63 The Sunflower Galaxy


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As Terry said, worth uploading your logs, but also review the PHD2 Best Practices guide. I haven't noticed any difference in Dec guiding pre/post a flip, but the thing that comes to mind is Dec balance. As far as I can remember, if you're West facing East pre a flip, and you're scope-heavy you are constantly in contact with the worm drive so Dec backlash doesn't play a part, but after the flip and you're East facing West, gravity and backlash could cause some short jerks as the scope front-end 'falls' away from the worm. This is covered in the PHD2 guide and in lots of forum posts here.

 

Oh and great photo! Love the detail.

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Lovely image Peter, I think Padraic is right regarding the pre/post flip guiding. 

The ideal situation would be to have a small weight that will automatically move up/down the shaft depending on if you are East or West side.

 

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43 minutes ago, TerryMcK said:

Are you using PHD2 Peter? If so you can upload the guide logs to the thread. They can be analysed with a tool from PHD2.

Thank you for your reply.  Yes I am using PHD2.  I will try to upload the log file to the thread 👍

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34 minutes ago, Padraic M said:

As Terry said, worth uploading your logs, but also review the PHD2 Best Practices guide. I haven't noticed any difference in Dec guiding pre/post a flip, but the thing that comes to mind is Dec balance. As far as I can remember, if you're West facing East pre a flip, and you're scope-heavy you are constantly in contact with the worm drive so Dec backlash doesn't play a part, but after the flip and you're East facing West, gravity and backlash could cause some short jerks as the scope front-end 'falls' away from the worm. This is covered in the PHD2 guide and in lots of forum posts here.

 

Oh and great photo! Love the detail.

 

Interesting I will have a look at the balance.  I have been concentrating on East West but perhaps I need to focus more on DEC.  Thank you for your feedback.

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13 minutes ago, MarkAR said:

Lovely image Peter, I think Padraic is right regarding the pre/post flip guiding. 

The ideal situation would be to have a small weight that will automatically move up/down the shaft depending on if you are East or West side.

 

 

OK thanks I will look into this idea...

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Nice capture and pretty amazing guiding for an AVX carrying a 200mm reflector !

I'd be more than happy with that.

Before flip 

image.png.9a4c4c0ae1b8c2e639371fac7e1b70d1.png

After flip

image.png.6225ba8d3a1f0152e8467f278eb0bf00.png

If you can improve it then probably dec balance maybe.

 

Cant see the dec aggression setting on log viewer but maybe increase if not on 100% already as it is taking quite a few adjustments to actually move in dec ( or possibly backlash ?)

But honestly thats sweet guiding already, you will be hard pushed to inmprove it 🙂

 

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40 minutes ago, GazAstro said:

Nice capture and pretty amazing guiding for an AVX carrying a 200mm reflector !

I'd be more than happy with that.

Before flip 

image.png.9a4c4c0ae1b8c2e639371fac7e1b70d1.png

After flip

image.png.6225ba8d3a1f0152e8467f278eb0bf00.png

If you can improve it then probably dec balance maybe.

 

Cant see the dec aggression setting on log viewer but maybe increase if not on 100% already as it is taking quite a few adjustments to actually move in dec ( or possibly backlash ?)

But honestly thats sweet guiding already, you will be hard pushed to inmprove it 🙂

 

 

Thanks for the feedback.  I spent a few nights playing around with the settings during the full moon last month.  I ended up with DEC aggression at 100%.  I also found that guiding was much better with the exposure set to 0.5s which might be going against the advice for the better mounts?  Multi star guiding made a massive difference and I am currently trying predictive PEC for RA.  I might also try training the PEC in the hand controller next time out to see if that makes any difference - will this fight with PHD2?  At the moment I am using the spiral dither option which seems to help in DEC.

Edited by PeterBolt
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Lovely image Peter, good detail with lots of flocculence. I was trying for the same target Thursday night but the predicted 3hrs clear became  1hr of intermittent clouds. Time is running out this side of summer!

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7 hours ago, paul said:

Lovely image Peter, good detail with lots of flocculence. I was trying for the same target Thursday night but the predicted 3hrs clear became  1hr of intermittent clouds. Time is running out this side of summer!

Yes it's a shame as I have really enjoyed galaxy season

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